Electro Magnetic Induction

Basics..

Electromagnetic Induction

Electromagnetic induction is the process by which a voltage/ current) are generated by the kinetic energy of a rotating wire in the presence of amagnet. Electromagnetic induction is used by machienes thatdetect metal pipes and wires in walls. For example a Generator (Dynamo)

Electromagnetic induction produces an alternating current which is due to half of the coil rotating towards the magnet's north, and the other half rotating towards the south. The coil changes direction every half turn.

The higher the frequency of the wave peaks in an A.C vs time graph the higher the voltage, and the higher the speed at which the coil is rotating.